Knife sharpener



Oct. 2, 1923. 1,469,684

7 AQOLSON ET AL KNIFE sHA'RPENER Filed April 11. 1922 [mm/22 013", 7 AM]01am A l 1'! Had]? Z e A7350; 6y

post may thus be firmly secured in the seat, it eing' obvious that avertical sliding niovement' thereof will change its relative posi tionwith respect to the post 5. As the angle lof inclinationof the wall 16is very slight, a minute adjustment of the relations between the twouprights is had. 7

The top of the post 16, is an exact duplicate of the top of the standardso that the disks may be interchanged from one post to the other. I V'Thedisks'are exact counter-parts of' each other, one disk'runningwith'its periphery immediately adjacent the flat face of the other, thestandard being disposed on the base plate accordingly to permitfthisarif ture described in the foregoing. Bymaking the disks"interchangeableas described, both flat faces of the disks are available for use as wellas the peripheries thereof, thereby materially eXtending the usefulnessof the device and the intervals forrenewal of disks. Itwill benoted'that by mounting one disk to} have its outer side flush with theperiphery of the other thepoints of contact between the cutting edge ofthe knife and the two inner peripheral edges of the disks areappreciably separated, as distinguished from rollers where thetwo-peripheral c0rnei'sjaife contiguous andthe knifeis drawn diagonallybetween them. In other words,

the point at which the shaving is being cutj from one side of thecutting edge of. the knife is spaced longitudinally a dis- 'tance equalto the .full thickness of either,

disk thereof, from point atl'whic-h the shaving is'heing cut ontheopposite side of'the knife edge. The advantage of thus having thesepoints spaced an appreciable distance from one another, enables theoperator to slightly move the knife laterally in a sharpening operationto thus secure a leverage tending to separate the wheels and therebysecure a relatively heavy pressure against the cutting edges-of thewheels concurrently with a drawing movement of the knifeovei the same.We havefound that this enables the corners of thedisks to take abetterhold on thest eel for removing an unbroken sliav ing therefrom. 1 n 'InFigure 3, a; designates a knife blade, the cutting edge thereof beinghere shown wedged-between the periphery of one and {the face of theother .disk,and being drawn 7 p 7 l toward the user as indicated by thearrows; 3. In a device for sharpening knives, a:

, a sharp edge.

in Figure 1, wherein the knife is indicated in dottedl lines. Thus, thedisks abrade the knife edgesimultaneously on opposite sides.

lVhenthe knife is pushed away from the user in a return stroke, theouter cornerref that disk which rolls on the side of the other, and theinner corner of the disk upon whose-side the first named disk rolls,will shave the cutting edge of the knife on opposite sidessimultaneously and thus effect When the user drawsthe knifein adirection intersectingtl'ie ninety degree angle between the inner facesof both disks, then the inner circular corner-of that disk rolling onthe side of the other, will shave one side of the cutting edge, andtheinner corner of the disk whose side is rolled upon, will shave theothe rside of thecutting edge of the knife with itsiinneriperipheral' corner.It will be noted itha'twhen the knife is drawn ma diagonal direct on, asustJdescribed, the points-on the ed-g e' ofthe knife acteduponsimultaneonsly by the two disks are appreciably separated, whichseparation.

isdue to the mounting'fof the disks so that one will roll 'on the sideof the other. Further, when the knife is drawn over the disks inasharpening operation, especially in'a diagonal direction, the disks areengaged at a point located on a level a trifle above their centers ofrotation, thus causing the, down pressure on the knife exerted bythe-user to rotate the disks slightly concurrently with a sharpeningmovement, and thus place a new cutting portion of the peripheral'cornersof the respective disks in play. VVe'claim:

1. In a deviceforsharpening knives,iin

combination, a base, a pair of steel disks'eac'h of uniform diameter andhavingflatfsides to form peripheral knife; sharpening c0r 11ers at thejuncture of the periphery with said sides, said fdisks being mounted andarranged on said 'baseto be normally rotatable, respectively, invertical planes at right; angles to each. other, andhave the inner perpheral knife sharpening corner of one disk 2. In a device for sharpeningknives, a

base, a pair of metallic disks-'rrotatably.

mounted on said base torotate respectively m vertical plane'swat rightangles to each other, so that the periphery of one diskwill roll on theface ofJthe other disk at; a point close tofthe outer edge ofthe'latter,flthe mounting of said disks including an adjust-- ablesupportfor that disk which rolls bn the; other, said 'support'being adjustablymovable in a vertical plane in a diagonal diiection relative to. theother disk.

base,- a pair of sharpening disks, rotatably mounted on said base torotate respectively in vertical planes atright angles to each other, sothat the periphery "of one disk will roll on the face of the'other diskat point close to the outer edgesof the latter,the mounting of saiddisks comprising awsupporting postfor each disk, each post having areadily removable outwardly extendingbearing member for rotatablysupporting its. 1 respective disk, said, bearing member having adisk-shaped head, at its :outer free i end, and a countersunk cavity'tofwholly receive said diskshapedhead in either side of each of saiddisksfto thereby render the disks reversible.

, 4. In a device for sharpening knives, a base,,a" pair of 1 metallicdisks ro-tatably mounted on said base to rotate respectively 1 recess oftheir respective disks.

in vertical planesiat right V'angles to each mounting of said diskcomprising afisup porting post for each disk, each"postv having bearingIn testimony whereof-We affi x oursi -f b natures. I

- A LOLSQK-p.

ALFRED I other, so that the periphery of on'e disk'will 1 l roll. on thefaceof the other disk at 'a point 1 r close to the outer edge of thelatter, the

